Home / 3,478.36-5,217.72-1,287.16

Finding the Fourth Proportional to 3,478.36, 5,217.72 and 1,287.16

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Solution

The fourth proportional to 3,478.36, 5,217.72 and 1,287.16 is: 1,930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.36 : 5,217.72 = 1,287.16 : x
  2. Step 2: Convert to fraction form
    3,478.36/5,217.72 = 1,287.16/x
  3. Step 3: Cross multiply
    3,478.36x = 5,217.72 × 1,287.16
  4. Step 4: Simplify right side
    3,478.36x = 6,716,040.48
  5. Step 5: Solve for x
    x = 6,716,040.48/3,478.36
  6. Step 6: Final answer
    x = 1,930.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.